2139650 has 12 divisors (see below), whose sum is σ = 3979842. Its totient is φ = 855840.

The previous prime is 2139611. The next prime is 2139653. The reversal of 2139650 is 569312.

It can be written as a sum of positive squares in 3 ways, for example, as 1605289 + 534361 = 1267^2 + 731^2 .

It is not an unprimeable number, because it can be changed into a prime (2139653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21347 + ... + 21446.

2^2139650 is an apocalyptic number.

2139650 is a deficient number, since it is larger than the sum of its proper divisors (1840192).

2139650 is a wasteful number, since it uses less digits than its factorization.

2139650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42805 (or 42800 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2139650 is about 1462.7542514038. The cubic root of 2139650 is about 128.8588484730.

The spelling of 2139650 in words is "two million, one hundred thirty-nine thousand, six hundred fifty".